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Vanharen M, Girard D. Impact of gold nanoparticles (AuNPs) on eosinophils isolated from male and female individuals. Immunobiology 2023; 228:152762. [PMID: 38006680 DOI: 10.1016/j.imbio.2023.152762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 11/06/2023] [Accepted: 11/19/2023] [Indexed: 11/27/2023]
Abstract
It is well established that some differences exist between the male and female immune systems. Despites this, a sex-based analysis is not frequently performed in most scientific published reports. Knowing that inflammation is a common undesired effect observed resulting from nanoparticle (NP) exposure, we investigate here how in vitro treatment of gold NPs with a primary size of 20 and 70 nm (AuNP20 and AuNP70, respectively) will alter the biology of human eosinophils isolated from men and women blood. We found that treatment of AuNP70, but not AuNP20, significantly delay apoptosis only in eosinophils isolated from women. AuNPs were found to decrease eosinophil phagocytosis, however, significance was only observed in AuNP20-induced eosinophils isolated from women. The production of IL-8 was significantly increased in response to both AuNPs but only in eosinophils isolated from men and the production of IL-1β was increased in AuNPs-induced eosinophils, although significance was observed only in AuNP70-induced eosinophils isolated from women. We conclude that future studies investigating the toxicity of AuNPs (or other NPs) should include a sex-based analysis, especially if the tested NPs have potential medical applications knowing the increased interest in the development of personalized precision medicine.
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Affiliation(s)
- Marion Vanharen
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Denis Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada.
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2
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Vanharen M, Mahbeer T, Léveillé A, Méthot A, Samountry P, Girard D. Impact of gold nanoparticles (AuNPs) in human neutrophils in vitro and in leukocytes attraction in vivo: A sex-based analysis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104319. [PMID: 37984677 DOI: 10.1016/j.etap.2023.104319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 11/09/2023] [Accepted: 11/15/2023] [Indexed: 11/22/2023]
Abstract
Some differences exist between the male and female immune systems. Despite this, a sex-based analysis is not frequently performed in most studies. Knowing that inflammation is a common undesired effect observed resulting from nanoparticle (NP) exposure, we investigate here how gold NPs with a primary size of 20 (AuNP20) and 70 nm (AuNP70) will alter the biology of polymorphonuclear neutrophil cells (PMNs) isolated from men and women as well as their potential pro-inflammatory effect in vivo in male and female mice. We found that AuNP20 significantly delay apoptosis only in PMN isolated from men. The production of interleukin (IL)- 8 by PMNs was increased by both AuNPs regardless of sex although significance was only observed in AuNP20-induced PMNs. Using the murine air pouch model of inflammation, AuNPs did not induce a neutrophilic infiltration regardless of sex. In conclusion, AuNPs could differently alter the biology of PMNs according to sex.
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Affiliation(s)
- Marion Vanharen
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Thomas Mahbeer
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Alexanne Léveillé
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Audrey Méthot
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Phonsiri Samountry
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Denis Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada.
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3
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Saafane A, Girard D. Interaction between iron oxide nanoparticles (IONs) and primary human immune cells: An up-to-date review of the literature. Toxicol In Vitro 2023:105635. [PMID: 37356554 DOI: 10.1016/j.tiv.2023.105635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 04/19/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
Nanotechnology has been gaining more and more momentum lately and the potential use of nanomaterials such as nanoparticles (NPs) continues to grow in a variety of activity sectors. Among the NPs, iron oxide nanoparticles (IONs) have retained an increasing interest from the scientific community and industrials due to their superparamagnetic properties allowing their use in many fields, including medicine. However, some undesired effects of IONs and potential risk for human health are becoming increasingly reported in several studies. Although many in vivo studies reported that IONs induce immunotoxicity in different animal models, it is not clear how IONs can alter the biology of primary human immune cells. In this article, we will review the works that have been done regarding the interaction between IONs and primary immune cells. This review also outlines the importance of using primary immune cells in risk assessment of NPs as a reliable strategy for encouraging non-animal studies approaches, to determine risks that might affect the human immune system following different exposure scenarios. Taken all together, the reported observations help to get a more global picture on how IONs alter the human immune system especially the fact that inflammation, known to involve several immune cell types, is frequently reported as an undesired effect of IONs.
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Affiliation(s)
- Abdelaziz Saafane
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada
| | - Denis Girard
- Laboratoire de Recherche en Inflammation et Physiologie des Granulocytes, Université du Québec, Institut National de la Recherche Scientifique (INRS)-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada.
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4
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Nesari F, Gholami M, Rezaian J, Pirnia A, Anbari K, Beigi Boroujeni M, Beigi Boroujeni M. Effects of zinc on expression of apoptosis-related genes in freezing thawing damage of adipose tissue derived mesenchymal stromal cells. Prep Biochem Biotechnol 2021; 52:640-647. [PMID: 34694192 DOI: 10.1080/10826068.2021.1983830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The present study was performed to investigate the effects of zinc supplementation on freezing thawing damage in adipose tissue-derived mesenchymal stromal cells (MSC) of mice through studying cellular viability and gene expression profile of apoptosis. Slow freezing method was conducted and the samples were treated with zinc doses 0, 2.5, 5, 10, 25, 50 and 100 µM. Viability was increased in groups of 2.5, 10 and 25 µM zinc in comparison to the control group. Gene expression study showed that in the group of 2.5 µM zinc, Fas, Bax and Caspase3 had down regulation. Up regulation of Bcl2 was observed in the groups of 10 and 25 µM zinc. P53 did not have a protecting regulation in the groups of study. The present study showed that doses 2.5-25 µM of zinc had a rather safe toxicity, increased cellular viability, and ameliorated expression of apoptosis-related genes in both intrinsic and extrinsic pathways.
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Affiliation(s)
- Fatemeh Nesari
- Department of Anatomical Sciences, Lorestan University of Medical Sciences, Khorramabad, Iran.,Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohammadreza Gholami
- Department of Anatomical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Jafar Rezaian
- Department of Anatomical Sciences, Lorestan University of Medical Sciences, Khorramabad, Iran.,Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Afshin Pirnia
- Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Khatereh Anbari
- Department of Community Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Masoud Beigi Boroujeni
- Department of Biochemistry, Payame Noor University, Faculty of Tehran, Branch of Tehran-Shargh, Tehran, Iran
| | - Mandana Beigi Boroujeni
- Department of Anatomical Sciences, Lorestan University of Medical Sciences, Khorramabad, Iran.,Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
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Vanharen M, Durocher I, Saafane A, Girard D. Evaluating the Apoptotic Cell Death Modulatory Activity of Nanoparticles in Men and Women Neutrophils and Eosinophils. Inflammation 2021; 45:387-398. [PMID: 34536156 DOI: 10.1007/s10753-021-01553-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/19/2021] [Accepted: 08/22/2021] [Indexed: 11/25/2022]
Abstract
Apoptosis is an important cell death mechanism for the resolution of inflammation. Neutrophil spontaneous apoptosis rates were reported to be slightly different in men and women and to be modulated by female sex hormones. The aim of this study was to determine whether different nanoparticles (NPs) will alter the neutrophil and eosinophil apoptotic rates differently in men and women. Using the antiapoptotic cytokine granulocyte-macrophage colony-stimulating factor (GM-CSF) and the proapoptotic plant lectin Viscum album agglutinin-I (VAA-I) as controls, we found that these factors respectively delay and induce apoptosis in both neutrophils and eosinophils with apoptotic rates remarkably similar in both sexes. The polyamidoamine (PAMAM) dendrimers of generation 0 (G0) and G3 slightly, but not significantly, accelerate neutrophil apoptosis regardless of sex. Zinc oxide (ZnO), titanium dioxide (TiO2), cerium dioxide (CeO2), and palladium (Pd) but not platinum (Pt) NPs were found to significantly delay neutrophil apoptosis. When results were compared between men and women, only ZnO and Pd NPs were found to significantly delay neutrophil apoptosis in men while ZnO, TiO2, CeO2, and Pt NPs inhibit apoptosis in women neutrophils. In eosinophils, G3, but not G0 NPs, significantly accelerate apoptosis in women. ZnO, Pt, and Pd NPs significantly delay eosinophil apoptosis but only in women. Unlike neutrophils, TiO2 and CeO2 NPs did not significantly delay eosinophil apoptosis. We propose that future studies aiming at determining potential effect NPs on cellular biological processes should incorporate a sex-based analysis based on the differences reported here studying the impact of NPs on human granulocyte apoptosis.
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Affiliation(s)
- Marion Vanharen
- Laboratoire de Recherche en Inflammation Et Physiologie Des Granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | - Isabelle Durocher
- Laboratoire de Recherche en Inflammation Et Physiologie Des Granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | - Abdelaziz Saafane
- Laboratoire de Recherche en Inflammation Et Physiologie Des Granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | - Denis Girard
- Laboratoire de Recherche en Inflammation Et Physiologie Des Granulocytes, Université du Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada.
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Prasad AR, Williams L, Garvasis J, Shamsheera K, Basheer SM, Kuruvilla M, Joseph A. Applications of phytogenic ZnO nanoparticles: A review on recent advancements. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115805] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Verdon R, Gillies SL, Brown DM, Henry T, Tran L, Tyler CR, Rossi AG, Stone V, Johnston HJ. Neutrophil activation by nanomaterials in vitro: comparing strengths and limitations of primary human cells with those of an immortalized (HL-60) cell line. Nanotoxicology 2020; 15:1-20. [PMID: 33272088 DOI: 10.1080/17435390.2020.1834635] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Assessment of nanomaterial (NM) induced inflammatory responses has largely relied on rodent testing via measurement of leukocyte accumulation in target organs. Despite observations that NMs activate neutrophil driven inflammatory responses in vivo, a limited number of studies have investigated neutrophil responses to NMs in vitro. We compared responses between the human neutrophil-like HL-60 cell line and human primary neutrophils following exposure to silver (Ag), zinc oxide (ZnO), copper oxide (CuO) and titanium dioxide (TiO2) NMs. NM cytotoxicity and neutrophil activation were assessed by measuring cellular metabolic activity, cytokine production, respiratory burst, and release of neutrophil extracellular traps. We observed a similar pattern of response between HL-60 cells and primary neutrophils, however we report that some neutrophil functions are compromised in the cell line. Ag NMs were consistently observed to stimulate neutrophil activation, with CuO NMs inducing similar though weaker responses. TiO2 NMs did not induce a neutrophil response in either cell type. Interestingly, ZnO NMs readily induced activation of HL-60 cells but did not appear to activate primary cells. Our findings are relevant to the development of a tiered testing strategy for NM hazard assessment which promotes the use of non-rodent models. Whilst we acknowledge that HL-60 cells may not be a perfect substitute for primary cells and require further investigation regarding their ability to predict neutrophil activation, we recommend their use for initial screening of NM-induced inflammation. Primary human neutrophils can then be used for more focused assessments of neutrophil activation before progressing to in vivo models where necessary.
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Affiliation(s)
- Rachel Verdon
- Nano-Safety Research Group, Heriot-Watt University, Edinburgh, UK
| | | | - David M Brown
- Nano-Safety Research Group, Heriot-Watt University, Edinburgh, UK
| | - Theodore Henry
- Nano-Safety Research Group, Heriot-Watt University, Edinburgh, UK
| | - Lang Tran
- Statistics and Toxicology Section, Institute of Occupational Medicine, Edinburgh, UK
| | - Charles R Tyler
- College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Adriano G Rossi
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Vicki Stone
- Nano-Safety Research Group, Heriot-Watt University, Edinburgh, UK
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8
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Development of fibrin hydrogel–based in vitro bioassay system for assessment of skin permeability to and pro-inflammatory activity mediated by zinc ion released from nanoparticles. Anal Bioanal Chem 2020; 412:8269-8282. [DOI: 10.1007/s00216-020-02970-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/06/2020] [Accepted: 09/24/2020] [Indexed: 10/23/2022]
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9
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Lamas B, Martins Breyner N, Houdeau E. Impacts of foodborne inorganic nanoparticles on the gut microbiota-immune axis: potential consequences for host health. Part Fibre Toxicol 2020; 17:19. [PMID: 32487227 PMCID: PMC7268708 DOI: 10.1186/s12989-020-00349-z] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 05/11/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND In food toxicology, there is growing interest in studying the impacts of foodborne nanoparticles (NPs, originating from food additives, food supplements or food packaging) on the intestinal microbiome due to the important and complex physiological roles of these microbial communities in host health. Biocidal activities, as described over recent years for most inorganic and metal NPs, could favour chronic changes in the composition and/or metabolic activities of commensal bacteria (namely, intestinal dysbiosis) with consequences on immune functions. Reciprocally, direct interactions of NPs with the immune system (e.g., inflammatory responses, adjuvant or immunosuppressive properties) may in turn have effects on the gut microbiota. Many chronic diseases in humans are associated with alterations along the microbiota-immune system axis, such as inflammatory bowel diseases (IBD) (Crohn's disease and ulcerative colitis), metabolic disorders (e.g., obesity) or colorectal cancer (CRC). This raises the question of whether chronic dietary exposure to inorganic NPs may be viewed as a risk factor facilitating disease onset and/or progression. Deciphering the variety of effects along the microbiota-immune axis may aid the understanding of how daily exposure to inorganic NPs through various foodstuffs may potentially disturb the intricate dialogue between gut commensals and immunity, hence increasing the vulnerability of the host. In animal studies, dose levels and durations of oral treatment are key factors for mimicking exposure conditions to which humans are or may be exposed through the diet on a daily basis, and are needed for hazard identification and risk assessment of foodborne NPs. This review summarizes relevant studies to support the development of predictive toxicological models that account for the gut microbiota-immune axis. CONCLUSIONS The literature indicates that, in addition to evoking immune dysfunctions in the gut, inorganic NPs exhibit a moderate to extensive impact on intestinal microbiota composition and activity, highlighting a recurrent signature that favours colonization of the intestine by pathobionts at the expense of beneficial bacterial strains, as observed in IBD, CRC and obesity. Considering the long-term exposure via food, the effects of NPs on the gut microbiome should be considered in human health risk assessment, especially when a nanomaterial exhibits antimicrobial properties.
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Affiliation(s)
- Bruno Lamas
- INRAE Toxalim UMR 1331 (Research Center in Food Toxicology), Team Endocrinology and Toxicology of the Intestinal Barrier, INRAE, Toulouse University, ENVT, INP-Purpan, UPS, 180 Chemin de Tournefeuille, 31027, Toulouse cedex 3, France.
| | - Natalia Martins Breyner
- INRAE Toxalim UMR 1331 (Research Center in Food Toxicology), Team Endocrinology and Toxicology of the Intestinal Barrier, INRAE, Toulouse University, ENVT, INP-Purpan, UPS, 180 Chemin de Tournefeuille, 31027, Toulouse cedex 3, France
| | - Eric Houdeau
- INRAE Toxalim UMR 1331 (Research Center in Food Toxicology), Team Endocrinology and Toxicology of the Intestinal Barrier, INRAE, Toulouse University, ENVT, INP-Purpan, UPS, 180 Chemin de Tournefeuille, 31027, Toulouse cedex 3, France.
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10
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Özsobacı NP, Ergün DD, Tunçdemir M, Özçelik D. Protective Effects of Zinc on 2.45 GHz Electromagnetic Radiation-Induced Oxidative Stress and Apoptosis in HEK293 Cells. Biol Trace Elem Res 2020; 194:368-378. [PMID: 31317470 DOI: 10.1007/s12011-019-01811-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/01/2019] [Indexed: 12/19/2022]
Abstract
Several epidemiological studies have shown that exposure to electromagnetic radiation (EMR) can be harmful to human health. The purpose of this study was to examine oxidative parameters and apoptosis induced by EMR in human kidney embryonic cells (HEK293) and to investigate whether zinc (Zn) has protective effect on EMR-induced apoptosis in HEK293 cells. For our experiment, HEK293 cells were divided into four main groups, control, EMR, 50 μM Zn + EMR, and 100 μM Zn + EMR. HEK293 cells of EMR groups were exposed to 2.45 GHz EMR for 1 h. In Zn groups, HEK293 cells were incubated with different concentrations of Zn for 48 h before EMR exposure. Oxidative stress parameters were determined by spectrophotometric method; bcl-2 and caspase-3 were assessed immunohistochemically and TUNEL method was performed for apoptotic activity. EMR group had higher malondialdehyde (MDA) level and lower superoxide dismutase (SOD) activity compared with control group. In Zn-applied groups, MDA was decreased and SOD activity was increased compared with EMR group. The number of the apoptotic cells and caspase-3 immunopositive cells at EMR group was increased significantly compared with the control group, whereas bcl-2 was decreased. Besides, Zn-treated groups showed a significant reduction in the number of apoptotic cells and caspase-3 from that of EMR group, whereas there was an increase in bcl-2 immunopositivity. Our findings show that EMR caused oxidative stress and apoptotic activation in HEK293 cells. Zn seems to have protective effects on the EMR by increasing SOD activity and bcl-2 immunopositivity, decreasing lipid peroxidation and caspas-3 immunopositivity.
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Affiliation(s)
- Nural Pastacı Özsobacı
- Biophysics Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey.
| | - Dilek Düzgün Ergün
- Biophysics Department, Faculty of Medicine, Istanbul Aydın University, Istanbul, Turkey
| | - Matem Tunçdemir
- Medical Biology Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Derviş Özçelik
- Biophysics Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
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11
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Keerthana S, Kumar A. Potential risks and benefits of zinc oxide nanoparticles: a systematic review. Crit Rev Toxicol 2020; 50:47-71. [PMID: 32186437 DOI: 10.1080/10408444.2020.1726282] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- S. Keerthana
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Lucknow, Uttar Pradesh, India
| | - A. Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Lucknow, Uttar Pradesh, India
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12
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Mitarotonda R, Giorgi E, Desimone MF, De Marzi MC. Nanoparticles and Immune Cells. Curr Pharm Des 2019; 25:3960-3982. [DOI: 10.2174/1381612825666190926161209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/17/2019] [Indexed: 02/07/2023]
Abstract
Nanoparticles have gained ground in several fields. However, it is important to consider their potentially
hazardous effects on humans, flora, and fauna. Human exposure to nanomaterials can occur unintentionally
in daily life or in industrial settings, and the continuous exposure of the biological components (cells, receptors,
proteins, etc.) of the immune system to these particles can trigger an unwanted immune response (activation or
suppression). Here, we present different studies that have been carried out to evaluate the response of immune
cells in the presence of nanoparticles and their possible applications in the biomedical field.
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Affiliation(s)
- Romina Mitarotonda
- Laboratorio de Inmunologia, Instituto de Ecologia y Desarrollo Sustentable (INEDES) UNLu-CONICET, Buenos Aires, Argentina
| | - Exequiel Giorgi
- Laboratorio de Inmunologia, Instituto de Ecologia y Desarrollo Sustentable (INEDES) UNLu-CONICET, Buenos Aires, Argentina
| | - Martín F. Desimone
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Tecnicas (CONICET), Instituto de la Quimica y Metabolismo del Farmaco (IQUIMEFA), Facultad de Farmacia y Bioquimica, Buenos Aires, Argentina
| | - Mauricio C. De Marzi
- Laboratorio de Inmunologia, Instituto de Ecologia y Desarrollo Sustentable (INEDES) UNLu-CONICET, Buenos Aires, Argentina
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13
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Tang KS. The current and future perspectives of zinc oxide nanoparticles in the treatment of diabetes mellitus. Life Sci 2019; 239:117011. [PMID: 31669241 DOI: 10.1016/j.lfs.2019.117011] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/04/2019] [Accepted: 10/21/2019] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus (DM) is a multifaceted and costly disease, which requires serious attention. Finding a cheaper anti-diabetic alternative that can act on multiple disease-related targets and pathways is the ultimate treatment goal for DM. Nanotechnology has offered some exciting possibilities in biomedical and drug delivery applications. Zinc oxide nanoparticles (ZnO-NPs), a novel agent to deliver zinc, have great implications in many disease therapies including DM. This review summarizes the pharmacological mechanisms by which ZnO-NPs alleviate DM and diabetic complications. Research implications and future perspectives were also discussed.
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Affiliation(s)
- Kim San Tang
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia; Tropical Medicine and Biology Multidisciplinary Platform, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
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15
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Esnault S, Kelly EA, Johnson SH, DeLain LP, Haedt MJ, Noll AL, Sandbo N, Jarjour NN. Matrix Metalloproteinase-9-Dependent Release of IL-1 β by Human Eosinophils. Mediators Inflamm 2019; 2019:7479107. [PMID: 30906226 PMCID: PMC6398033 DOI: 10.1155/2019/7479107] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 11/22/2018] [Indexed: 12/14/2022] Open
Abstract
Asthma is often associated with airway eosinophilia, and therapies targeting eosinophils are now available to treat severe eosinophilic asthma. Eosinophilic asthma is often due to a type-2 immune response and production of IL-5, which leads to eosinophilopiesis and recruitment of mature eosinophils in the airways. A concomitant type-2 and type-17 response has been reported in some individuals. IL-17 may be enhanced by IL-1β production and can lead to neutrophilic inflammation. In fact, both eosinophilic and neutrophilic (mixed granulocytic) inflammation are simultaneously present in a large population of patients with asthma. In monocyte/macrophage cell populations, release of mature IL-1β occurs via toll-like receptor ligand-induced activation of the inflammasome. Within the inflammasome, a cascade of events leads to the activation of caspase-1, which cleaves pro-IL-1β protein into a mature, releasable, and active form. We have demonstrated that eosinophils can release IL-1β in a Toll-like receptor ligand-independent fashion. The objective of this study was to determine the mechanisms underlying the production and maturation of IL-1β in cytokine-activated eosinophils. Using eosinophils from circulating blood and from bronchoalveolar lavage fluid after an airway allergen challenge, the present study demonstrates that cytokine-activated eosinophils express and release a bioactive form of IL-1β with an apparent size less than the typical 17 kDa mature form produced by macrophages. Using a zymography approach and pharmacological inhibitors, we identified matrix metalloproteinase-9 (MMP-9) as a protease that cleaves pro-IL-1β into a ~15 kDa form and allows the release of IL-1β from cytokine-activated eosinophils. Therefore, we conclude that activated eosinophils produce MMP-9, which causes the release of IL-1β in an inflammasome/caspase-1-independent manner. The production of IL-1β by eosinophils may be a link between the eosinophilic/type-2 immune response and the neutrophilic/type-17 immune response that is often associated with a more severe and treatment-refractory type of asthma.
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Affiliation(s)
- Stephane Esnault
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Elizabeth A. Kelly
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Sean H. Johnson
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Larissa P. DeLain
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Madeline J. Haedt
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Andrea L. Noll
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Nathan Sandbo
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
| | - Nizar N. Jarjour
- University of Wisconsin-Madison School of Medicine and Public Health, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Madison, WI, USA
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16
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Horie M, Shimizu K, Tabei Y. Validation of metallothionein, interleukin-8, and heme oxygenase-1 as markers for the evaluation of cytotoxicity caused by metal oxide nanoparticles. Toxicol Mech Methods 2018; 28:630-638. [PMID: 29882686 DOI: 10.1080/15376516.2018.1486931] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Metal oxide nanoparticles have an industrial value, although their harmful effects are also known. Induction of respiratory inflammation through their inhalation is a serious indicator of their toxicity. Although the phenomenon of metal ion release is involved in the induction of inflammation, all metal ions are not necessarily toxic. However, currently, no particular index to evaluate cytotoxicity caused by nanoparticles exists. An index based on biological response is critical. In the present study, we examined the gene expression-based index for nanoparticle-derived cytotoxicity. The cellular effects of six kinds of metal oxide nanoparticles, ZnO, NiO, CuO, MgO, Bi2O3, and MoO3 on A549 cells were examined. It was seen that lactate dehydrogenase (LDH) assay, which is one of the most important assays for assessing cell membrane damage, is inhibited by metal ions released from the metal oxide nanoparticles. In some cases, enzyme activity-based assay was not suitable for the evaluation of cytotoxicity of nanoparticles. ZnO and CuO nanoparticles displayed severe cytotoxicity and enhanced gene expression of heme oxygenase-1 (HO-1) and interleukin-8 (IL-8). The IL-8 gene expression was also increased from Bi2O3 exposure. Additionally, the gene expression of metallothionein 2A (MT2A) was enhanced in the ZnO, CuO, and Bi2O3 exposed cells. These results suggest that these nanoparticles released metal ions in the cells. The enhancement of HO-1, IL-8, and MT2A gene expressions was related to the cytotoxic activity of metal oxide nanoparticles. Thus, the expression level of these genes is a good indicator of nanotoxicology of metal oxide nanoparticles.
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Affiliation(s)
- Masanori Horie
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
| | - Kaori Shimizu
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan.,b Graduate School of Life Sciences , Toyo University , Itakura , Gunma , Japan
| | - Yosuke Tabei
- a Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu , Kagawa , Japan
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17
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Baltaci AK, Yuce K, Mogulkoc R. Zinc Metabolism and Metallothioneins. Biol Trace Elem Res 2018; 183:22-31. [PMID: 28812260 DOI: 10.1007/s12011-017-1119-7] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 08/02/2017] [Indexed: 12/20/2022]
Abstract
Among the trace elements, zinc is one of the most used elements in biological systems. Zinc is found in the structure of more than 2700 enzymes, including hydrolases, transferases, oxyreductases, ligases, isomerases, and lyases. Not surprisingly, it is present in almost all body cells. Preserving the stability and integrity of biological membranes and ion channels, zinc is also an intracellular regulator and provides structural support to proteins during molecular interactions. It acts as a structural element in nucleic acids or other gene-regulating proteins. Metallothioneins, the low molecular weight protein family rich in cysteine groups, are involved significantly in numerous physiological and pathological processes including particularly oxidative stress. A critical role of metallothioneins (MT) is to bind zinc with high affinity and to serve as an intracellular zinc reservoir. By releasing free intracellular zinc when needed, MTs mediate the unique physiological roles of zinc. MT expression is induced by zinc elevation, and thus, zinc homeostasis is maintained. That MT mediates the effects of zinc, besides having strong radical scavenging effects, points to the critical part it plays in oxidative stress. The present review aims to give information on metallothioneins, which have critical importance in the metabolism and molecular pathways of zinc.
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Affiliation(s)
| | - Kemal Yuce
- Department of Physiology, Medical Faculty, Selcuk University, Konya, Turkey
| | - Rasim Mogulkoc
- Department of Physiology, Medical Faculty, Selcuk University, Konya, Turkey
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18
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Chhay P, Murphy-Marion M, Samson Y, Girard D. Activation of human eosinophils with palladium nanoparticles (Pd NPs): importance of the actin cytoskeleton in Pd NPs-induced cellular adhesion. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 57:95-103. [PMID: 29245060 DOI: 10.1016/j.etap.2017.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 06/07/2023]
Abstract
Palladium (Pd) is known to be released into the environment in the fine and ultrafine (at the nanoscale) airborne particle fractions mainly from automobile catalytic converters leading to an increase human exposure to this noble metal. It was reported that Pd can induce allergic reactions in individuals exposed to it via different ways. Some studies reported an increased number of eosinophils into airways following NP exposure in vivo in rodent models of allergies and inflammation. Knowing the importance of eosinophils in allergies, asthma and other lung diseases, it is surprising to observe that the direct effect of Pd at the nanoscale in eosinophils has been poorly documented. The aim of this study was to determine how Pd NPs will affect the biology of human eosinophils. Characterization of Pd NPs by dynamic light scattering indicates the presence of some aggregates when suspended in diverse solutions used here for the different experiments. Pd NPs did not significantly induce cell necrosis and apoptosis in eosinophils (0.5-150μg/ml) as assessed by trypan blue exclusion assay, flow cytometry after staining with FITC-annexin V and propidium iodide and by morphological observations by optical microscopy. PD NPs, unlike the positive controls, did not induce reactive oxygen species (ROS) but were found to target the actin cytoskeleton, since actin was differently re-located intracellularly when compared to untreated cells as determined by fluorescence microscopy. Clearly, Pd NPs were found to increase adhesion of eosinophils onto human endothelial EA.hy926 cells. Using cytochalasin D, a cell-permeable and potent inhibitor of actin polymerization, this ability to increase adhesion was drastically reversed. Our results indicate that Pd NPs can target the cytoskeleton and increase the adhesion of human eosinophils by an actin-dependent mechanism. These findings show that human eosinophils can be activated by Pd NPs emphasizing the importance of fully investigating how these NPs could alter the biology of human cells involved in allergies, asthma and other lung diseases as well as in various other inflammatory disorders.
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Affiliation(s)
- P Chhay
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Quebec, Canada
| | - M Murphy-Marion
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Quebec, Canada
| | - Y Samson
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Quebec, Canada
| | - D Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Quebec, Canada.
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19
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Meldrum K, Guo C, Marczylo EL, Gant TW, Smith R, Leonard MO. Mechanistic insight into the impact of nanomaterials on asthma and allergic airway disease. Part Fibre Toxicol 2017; 14:45. [PMID: 29157272 PMCID: PMC5697410 DOI: 10.1186/s12989-017-0228-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 11/10/2017] [Indexed: 01/02/2023] Open
Abstract
Asthma is a chronic respiratory disease known for its high susceptibility to environmental exposure. Inadvertent inhalation of engineered or incidental nanomaterials is a concern for human health, particularly for those with underlying disease susceptibility. In this review we provide a comprehensive analysis of those studies focussed on safety assessment of different nanomaterials and their unique characteristics on asthma and allergic airway disease. These include in vivo and in vitro approaches as well as human and population studies. The weight of evidence presented supports a modifying role for nanomaterial exposure on established asthma as well as the development of the condition. Due to the variability in modelling approaches, nanomaterial characterisation and endpoints used for assessment in these studies, there is insufficient information for how one may assign relative hazard potential to individual nanoscale properties. New developments including the adoption of standardised models and focussed in vitro and in silico approaches have the potential to more reliably identify properties of concern through comparative analysis across robust and select testing systems. Importantly, key to refinement and choice of the most appropriate testing systems is a more complete understanding of how these materials may influence disease at the cellular and molecular level. Detailed mechanistic insight also brings with it opportunities to build important population and exposure susceptibilities into models. Ultimately, such approaches have the potential to more clearly extrapolate relevant toxicological information, which can be used to improve nanomaterial safety assessment for human disease susceptibility.
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Affiliation(s)
- Kirsty Meldrum
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Chang Guo
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Emma L Marczylo
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Timothy W Gant
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Rachel Smith
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Martin O Leonard
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK.
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20
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Murphy-Marion M, Girard D. WITHDRAWN: Titanium dioxide nanoparticles induce human eosinophil adhesion onto endothelial EA.hy926 cells via activation of phosphoinositide 3-kinase/Akt cell signalling pathway. Toxicol In Vitro 2017:S0887-2333(17)30320-X. [PMID: 29074229 DOI: 10.1016/j.tiv.2017.10.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 10/05/2017] [Accepted: 10/21/2017] [Indexed: 01/21/2023]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Maxime Murphy-Marion
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada
| | - Denis Girard
- Laboratoire de recherche en inflammation et physiologie des granulocytes, Université du Québec, INRS-Institut Armand-Frappier, Laval, Québec, Canada.
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21
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Feng Y, Min L, Zhang W, Liu J, Hou Z, Chu M, Li L, Shen W, Zhao Y, Zhang H. Zinc Oxide Nanoparticles Influence Microflora in Ileal Digesta and Correlate Well with Blood Metabolites. Front Microbiol 2017. [PMID: 28626453 PMCID: PMC5454036 DOI: 10.3389/fmicb.2017.00992] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Zinc oxide nanoparticles (ZnO NPs) are used widely in consumer and industrial products, however, their influence on gut microbiota and metabolism and their mutual interactions are not fully understood. In this study, the effects of ZnO NPs on ileal bacterial communities, plasma metabolites, and correlations between them were investigated. Hens were fed with different concentrations of ZnO NPs [based on Zn; 0 mg/kg (control), 25 mg/kg, 50 mg/kg, and 100 mg/kg] for 9 weeks. Subsequently, ileal digesta and blood plasma were collected for analysis of microflora and metabolites, respectively. The V3-V4 region of the 16S rRNA gene of ileal digesta microbiota was sequenced using the Illumina HiSeq 2500 platform. The predominant bacterial community in the ileum belongs to the phylum Firmicutes. The richness of the bacterial community was negatively correlated with increasing amounts of ZnO NPs (r = -0.636, P < 0.01); when ZnO NP levels were at 100 mg/kg, microbiota diversity was significantly decreased (P < 0.05). The community structure determined by LEfSe analysis indicated that Bacilli, Fusobacteria, and Proteobacteria were changed, and Lactobacillus was reduced by ZnO NPs. Moreover, metabolism as analyzed by nuclear magnetic resonance (NMR) indicated that glucose, some amino acids, and other metabolites were changed by ZnO NPs. Choline, lactate, and methionine were positively correlated with bacterial richness. In summary, ZnO NPs could influence the levels of microflora in ileal digesta, particularly Lactobacillus. Furthermore, the richness of the microbiota was related to changes in choline, lactate, and methionine metabolism.
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Affiliation(s)
- Yanni Feng
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Lingjiang Min
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Weidong Zhang
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Jing Liu
- Core Laboratories of Qingdao Agricultural UniversityQingdao, China
| | - Zhumei Hou
- College of Marine Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Meiqiang Chu
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Lan Li
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Wei Shen
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China
| | - Yong Zhao
- College of Animal Science and Technology, Qingdao Agricultural UniversityQingdao, China.,State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural SciencesBeijing, China
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural SciencesBeijing, China
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22
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Araujo-Lima CF, Nunes RJM, Carpes RM, Aiub CAF, Felzenszwalb I. Pharmacokinetic and Toxicological Evaluation of a Zinc Gluconate-Based Chemical Sterilant Using In Vitro and In Silico Approaches. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5746768. [PMID: 28197414 PMCID: PMC5288521 DOI: 10.1155/2017/5746768] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 12/12/2016] [Accepted: 12/26/2016] [Indexed: 11/18/2022]
Abstract
Sclerosing agents as zinc gluconate-based chemical sterilants (Infertile®) are used for chemical castration. This solution is injected into the animal testis, but there are not enough evidences of its safety profiles for the receivers. The present work aimed to establish the pharmacokinetics and toxicological activity of Infertile, using in vitro and in silico approaches. The evaluation at the endpoint showed effects in a dose-dependent manner. Since necrosis is potentially carcinogenic, the possible cell death mechanism could be apoptosis. Our data suggested that Infertile at 60 mM presented risk for animal health. Even though Infertile is a licensed product by the Brazilian Ministry of Agriculture, Livestock and Supply, it presented a high mutagenic potential. We suggest that the optimal dose must be less than 6 mM, once, at this concentration, no mutagenicity or genotoxicity was observed.
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Affiliation(s)
- Carlos F. Araujo-Lima
- Department of Biophysics and Biometry, Rio de Janeiro State University, Boulevard 28 de Setembro, 87 Fundos, 4° Andar, 20551-030 Rio de Janeiro, RJ, Brazil
| | - Rafael J. M. Nunes
- Department of Biophysics and Biometry, Rio de Janeiro State University, Boulevard 28 de Setembro, 87 Fundos, 4° Andar, 20551-030 Rio de Janeiro, RJ, Brazil
| | - Raphael M. Carpes
- Department of Biophysics and Biometry, Rio de Janeiro State University, Boulevard 28 de Setembro, 87 Fundos, 4° Andar, 20551-030 Rio de Janeiro, RJ, Brazil
| | - Claudia A. F. Aiub
- Department of Genetics and Molecular Biology, Federal University of the State of Rio de Janeiro, Rua Frei Caneca, 94 Centro, 20211-040 Rio de Janeiro, RJ, Brazil
| | - Israel Felzenszwalb
- Department of Biophysics and Biometry, Rio de Janeiro State University, Boulevard 28 de Setembro, 87 Fundos, 4° Andar, 20551-030 Rio de Janeiro, RJ, Brazil
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